debian 11 
bureau gnome 

J'utilise habituellement openvpn. 
J'ai besoin d'un client L2TP/IPsec. 

J'ai installé le paquet network-manager-l2tp (qui installe notamment 
strongswan). 

Quand j'utilise le menu VPN settings et que je fait ajouter (+) un L2TP, j'ai 
l'erreur 
Error: Unable to load VPN connection editor 

C'est exactement le pb signalé ici, qui parle de versions de gtk3 avec laquelle 
ça fonctionne mais pas avec gtk4 : 
https://github.com/nm-l2tp/NetworkManager-l2tp/issues/186 
J'ai gtk2 et 3 et peut-être des bouts de 4 installés, apparamment (voir dpkg -l 
| grep gtk en pied de message). 

Est-ce un problème connu ? 
Comment le régler ? 

En dépannage urgent, quel client en CLI me permettrait une connexion à ce 
serveur vpn en l2tp ? 
Il y aurait une solution avec xl2tpd ou/et openswan mais je ne l'ai jamais 
utilisée. 
[ https://wiki.archlinux.org/title/Openswan_L2TP/IPsec_VPN_client_setup | 
https://wiki.archlinux.org/title/Openswan_L2TP/IPsec_VPN_client_setup ] 

Merci. 

======================= 
$ dpkg -l | grep gtk 
ii gir1.2-gtk-2.0:amd64 2.24.33-2 amd64 GTK graphical user interface library -- 
gir bindings 
ii gir1.2-gtk-3.0:amd64 3.24.24-4+deb11u3 amd64 GTK graphical user interface 
library -- gir bindings 
ii gir1.2-gtk-vnc-2.0:amd64 1.0.0-1 amd64 GObject introspection data for 
GTK-VNC 
ii gir1.2-gtkchamplain-0.12:amd64 0.12.20-1 amd64 Gtk+ widget to display maps 
(GObject introspection) 
ii gir1.2-gtkclutter-1.0:amd64 1.8.4-4 amd64 GObject introspection data for the 
GTK+ Clutter library 
ii gir1.2-gtksource-3.0:amd64 3.24.11-2 amd64 gir files for the GTK+ syntax 
highlighting widget 
ii gir1.2-gtksource-4:amd64 4.8.0-1 amd64 gir files for the GTK+ syntax 
highlighting widget 
ii gir1.2-javascriptcoregtk-4.0:amd64 2.40.3-2~deb11u1 amd64 JavaScript engine 
library from WebKitGTK - GObject introspection data 
ii gir1.2-spiceclientgtk-3.0:amd64 0.39-1 amd64 GTK3 widget for SPICE clients 
(GObject-Introspection) 
ii gstreamer1.0-gtk3:amd64 1.18.4-2+deb11u2 amd64 GStreamer plugin for GTK+3 
ii gtk-sharp2 2.12.40-3 all GTK# 2.10 suite, CLI bindings for GTK+ 
ii gtk-sharp2-examples 2.12.40-3 all sample applications for the GTK# 2.10 
toolkit 
ii gtk-sharp2-gapi 2.12.40-3 amd64 C source parser and C# code generator for 
GObject based APIs 
ii gtk-update-icon-cache 3.24.24-4+deb11u3 amd64 icon theme caching utility 
ii gtk2-engines-pixbuf:amd64 2.24.33-2 amd64 pixbuf-based theme for GTK 2 
ii ibus-gtk:amd64 1.5.23-2 amd64 Intelligent Input Bus - GTK2 support 
ii ibus-gtk3:amd64 1.5.23-2 amd64 Intelligent Input Bus - GTK3 support 
ii libavahi-ui-gtk3-0:amd64 0.8-5+deb11u2 amd64 Avahi GTK+ User interface 
library for GTK3 
ii libcanberra-gtk-module:amd64 0.30-7 amd64 translates GTK+ widgets signals to 
event sounds 
ii libcanberra-gtk0:amd64 0.30-7 amd64 GTK+ helper for playing widget event 
sounds with libcanberra 
ii libcanberra-gtk3-0:amd64 0.30-7 amd64 GTK+ 3.0 helper for playing widget 
event sounds with libcanberra 
ii libcanberra-gtk3-module:amd64 0.30-7 amd64 translates GTK3 widgets signals 
to event sounds 
ii libchamplain-gtk-0.12-0:amd64 0.12.20-1 amd64 Gtk+ widget to display maps 
ii libcheese-gtk25:amd64 3.38.0-3 amd64 tool to take pictures and videos from 
your webcam - widgets 
ii libclutter-gtk-1.0-0:amd64 1.8.4-4 amd64 Open GL based interactive canvas 
library GTK+ widget 
ii libcolord-gtk1:amd64 0.1.26-2 amd64 GTK+ convenience library for interacting 
with colord 
ii libdbusmenu-gtk3-4:amd64 18.10.20180917~bzr492+repack1-2 amd64 library for 
passing menus over DBus - GTK-3+ version 
ii libdbusmenu-gtk4:amd64 18.10.20180917~bzr492+repack1-2 amd64 library for 
passing menus over DBus - GTK-2+ version 
ii libgnome-autoar-gtk-0-0:amd64 0.2.4-3 amd64 GTK+ widgets for the GNOME 
Autoar library 
ii libgtk-3-0:amd64 3.24.24-4+deb11u3 amd64 GTK graphical user interface 
library 
ii libgtk-3-bin 3.24.24-4+deb11u3 amd64 programs for the GTK graphical user 
interface library 
ii libgtk-3-common 3.24.24-4+deb11u3 all common files for the GTK graphical 
user interface library 
ii libgtk-3-dev:amd64 3.24.24-4+deb11u3 amd64 development files for the GTK 
library 
ii libgtk-vnc-2.0-0:amd64 1.0.0-1 amd64 VNC viewer widget for GTK+3 (runtime 
libraries) 
ii libgtk2.0-0:amd64 2.24.33-2 amd64 GTK graphical user interface library - old 
version 
ii libgtk2.0-bin 2.24.33-2 amd64 programs for the GTK graphical user interface 
library 
ii libgtk2.0-cil 2.12.40-3 amd64 CLI binding for the GTK+ toolkit 2.12 
ii libgtk2.0-cil-dev 2.12.40-3 amd64 CLI binding for the GTK+ toolkit 2.12 
ii libgtk2.0-common 2.24.33-2 all common files for the GTK graphical user 
interface library 
ii libgtk2.0-dev:amd64 2.24.33-2 amd64 development files for the GTK library 
ii libgtk3-perl 0.038-1 all Perl bindings for the GTK+ graphical user interface 
library 
ii libgtkmm-3.0-1v5:amd64 3.24.2-2 amd64 C++ wrappers for GTK+ (shared 
libraries) 
ii libgtksourceview-3.0-1:amd64 3.24.11-2 amd64 shared libraries for the GTK+ 
syntax highlighting widget 
ii libgtksourceview-3.0-common 3.24.11-2 all common files for the GTK+ syntax 
highlighting widget 
ii libgtksourceview-3.0-dev:amd64 3.24.11-2 amd64 development files for the 
GTK+ syntax highlighting widget 
ii libgtksourceview-4-0:amd64 4.8.0-1 amd64 shared libraries for the GTK+ 
syntax highlighting widget 
ii libgtksourceview-4-common 4.8.0-1 all common files for the GTK+ syntax 
highlighting widget 
ii libgtksourceview2.0-0:amd64 2.10.5-3 amd64 shared libraries for the GTK+ 
syntax highlighting widget 
ii libgtksourceview2.0-common 2.10.5-3 all common files for the GTK+ syntax 
highlighting widget 
ii libgtksourceview2.0-dev:amd64 2.10.5-3 amd64 development files for the GTK+ 
syntax highlighting widget 
ii libgtkspell3-3-0:amd64 3.0.10-1 amd64 spell-checking addon for GTK+'s 
TextView widget 
ii libjavascriptcoregtk-4.0-18:amd64 2.40.3-2~deb11u1 amd64 JavaScript engine 
library from WebKitGTK 
ii liblibreofficekitgtk 1:7.0.4-4+deb11u7 amd64 GTK3 widget wrapping 
LibreOffice functionality 
ii libreoffice-gtk3 1:7.0.4-4+deb11u7 amd64 office productivity suite -- GTK+ 3 
integration 
ii libspice-client-gtk-3.0-5:amd64 0.39-1 amd64 GTK3 widget for SPICE clients 
(runtime library) 
ii libwebkit2gtk-4.0-37:amd64 2.40.3-2~deb11u1 amd64 Web content engine library 
for GTK 
ii libwxgtk3.0-0v5:amd64 3.0.4+dfsg-8 amd64 wxWidgets Cross-platform C++ GUI 
toolkit (GTK+ runtime) 
ii libwxgtk3.0-gtk3-0v5:amd64 3.0.5.1+dfsg-2 amd64 wxWidgets Cross-platform C++ 
GUI toolkit (GTK 3 runtime) 
rc lightdm-gtk-greeter 2.0.8-2 amd64 simple display manager (GTK+ greeter) 
ii monodoc-gtk2.0-manual 2.12.40-3 all compiled XML documentation for GTK# 2.10 
ii python3-wxgtk4.0 4.0.7+dfsg-10 amd64 Python 3 interface to the wxWidgets 
Cross-platform C++ GUI toolkit 
ii qt5-gtk-platformtheme:amd64 5.15.2+dfsg-9 amd64 Qt 5 GTK+ 3 platform theme 
ii software-properties-gtk 0.96.20.2-2.1 all manage the repositories that you 
install software from (gtk) 
ii transmission-gtk 3.00-1 amd64 lightweight BitTorrent client (GTK+ interface) 
ii xdg-desktop-portal-gtk 1.8.0-1 amd64 GTK+/GNOME portal backend for 
xdg-desktop-portal 
ii xdg-user-dirs-gtk 0.10-3 amd64 tool to manage well known user directories 
(Gtk extension) 



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